h4.thong-bao-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 15px;
  border-radius: 10px;
  margin-bottom: 15px;
  font-weight: 500;
  font-size: 1.2rem;
  text-decoration: none !important;
  transition: all 0.3s;
  cursor: pointer;
}

h4.thong-bao-header:hover {
  opacity: 0.9;
  transform: translateX(5px);
}

h4.thong-bao-header a {
  color: inherit;
  text-decoration: none;
  flex-grow: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

h4.thong-bao-header .circle-icon {
  background-color: white;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-left: 10px;
}

h4.thong-bao-header.bg-tuyen-sinh {
  background-color: #12d712;
  color: #fff;
}

h4.thong-bao-header.bg-giang-vien {
  background-color: #5bc0de;
  color: #fff;
}

h4.thong-bao-header.bg-sinh-vien {
  background-color: #f0ad4e;
  color: #fff;
}

h4.thong-bao-header.bg-hoc-vien {
  background-color: #d9534f;
  color: #fff;
}

h4.thong-bao-header.bg-tuyen-sinh .circle-icon i {
  color: #5cb85c;
}

h4.thong-bao-header.bg-giang-vien .circle-icon i {
  color: #5bc0de;
}

h4.thong-bao-header.bg-sinh-vien .circle-icon i {
  color: #f0ad4e;
}

h4.thong-bao-header.bg-hoc-vien .circle-icon i {
  color: #d9534f;
}

.section2 .col-md-4 .col-md-12 {
  margin-bottom: 20px;
}